<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    var a,b,c;
   var a = 1==3+32+4 || true;
   console.log(a);//false

    //三元表达式 = 条件表达式 ? 表达式1 :三元表达式
   var a = 30;
   var b = 20;
    console.log(a>b ? (a>25 ? '大于25':'大于20'):'小于')
</script>
</body>
</html>